Process for improving fastiness properties of direct dyestuffs



Patented Aug. 18, 1953 PRocEssFoR mm ovmdrns'rmissrnfifi ERTIES OF DIRECT DYESTUFFS Hans Martin Hpinmi, Basel, Switzerland and: laul Trefzer, Milan, Italy, assignors to Samloz Limited, Basel, Switzerland, a Swiss firm No Drawing;

Original applicationfleeenrber 1;

1947, Serial No. 789,134. Divided and tliis application Eebruary 8, 195Q,= Serial- Nm 143,162. In- Switzerland December 3, I946 11 Glaims.

The present application is adivision of our copending application Ser. No 7%3134 filed December 1', I947; no'w' Patent No; 216 223713. I

The present invention relates" to a' n-iethod for improving the fastnessproperties of d'yeings and printings made on textile material and the like with direct dyestuffs, and to the resultant dyed and printed products;

A- primary object ofthe' invention is to effect an improvementin the fastness' off dyeings and printings produced on textile materials with direct dyestuffs, by the treatment of'sucli dyeings. andsprintings with a Water s'oluble polymeric organic nitrogen. compound obtained by" condenswherein R1, R22 and v R3: each represents a member of: the":- group consisting of hydrogen oxyalkyl andzalkyl; n being two-or threeand m represent,- ingaxpositive integer, With-dicyandiamide.v Su'ch condensation: being; according,- to the present in.- vent'i'on; carriedout at elevated temperature and involving; splitting off of ammonia, the resultant condensation productcor-responds to the formula are: forexample' :diethylenetriamin'e; triethylene tetramine: or, high molecular polyethylenepolyamines, polypropylenepolyamines; di-(-hydroxy.- propylene) tria-mineszf or high molecule-n pol-y- (hydroxy propylene');-'-polyamines';\- or: derivatives reacting? in 1 that same way 'as these: amines, for example, carbonates or carbamates thereof'.

The final products" are b'asic Sirupy or thick;

almost eeioui ise lieiuids or s'o'lidsubstances, wh witii the of erigan'ic or inorganic acids ea; be cenvertedmtosaitsa T neb'asic products or their Water-soluble saltsa're suitable by them some 0i Mfiibfiifiid 8H- W a'jter' -soluble Salts of the poi walent metal-s siijc'h" copper, for an prov-mg lill' iastness properties Oi (Ely-sings with substantive dye for the preparation of pig errortl'ie' amine-Esteem c'fl cell ulbsic' fibres;

They possess furthermore the property of precipitating acid dyestuifsii rom their aqueous solutions. I 1,

Other methods at; applying the principle of this invention may be eniployed instead of tlios explained, forit Will'be apparent tl'i'at obvious modification thereofmay be made within the skill ef: art-without departing from the scope of the-appended claims; J

The preparation of the' compounds described may be;further'illustratedby'the iollowinel'sp'eci fic examples inwtifich the indications can be varied within wide limits.

Example 1 146 parts of triethyleri'etetramine, boiling point 270 271 62, and partsof dicya'ndiarriide are placed in a vesserfittedwitirsn ng sli'o'r't reiiiix condenser and iii increased to lflb l l *eup'ori" evenin -n of ammonia" ensues: At 110 mass becomes clear; and after decrease or the reaction the temperature i's iii'cieas'ed to 1'40 G?-a-n'd maintaih'edafitiiatpoiiit. 1 4 to l'ii licurs tlie mass is withdrawn; cooled and powdered-. It canbef'used"assiiclior the form o'f' its neutral Salt; if" desired to'gtljei' Witfi coppersalts for the improvemenr'of the" rasthess of dyein'gs witfi substantive dy'stufisf ExumpZe'Z 4755" parts" or tetraetiiyl'nepefita 1e": and 42 parts of dicyanuiam'i ar"p1 a c'ed-*1 'siiitaiole vessel" fitted witlfstir gear and a -refl' xcondenser and lieated Witli" strongly and" begins to evol 115-1'25c. The-"temperature to"1'40"CI"and he'ri"tp"16-'""l76' spurred-fer '6' tbi9 lio'uis becomes more aiidf more yi' bu aiiiodnts to" 17 parts: Witl'if the a-i'a of this nitrogenous condensationprbduc'twr witli the salts tliere'o'f substantiiief dyestuif's" for eiiainple canbt; aft tre aftd fdrthe pur oseor prevent ingf'blee-dirig iriho tbathsf .ztlei arts? or polytliyleiiepoWainir'ie," boning pointaat' 711mm; overdo? 0., and ;etpar't oi dicyandiamid 'ariiiixed a"siiitable' vessel fitted With stirring gear affd" rfiaintained for" 3 we" 5 hours at 125-165 C. A sample should be still soluble in water. If the mass becomes too thick the stirring is stopped and the heating continued without stirring. The condensation product ob-. tained is powdered after cooling; It can be used as such or in the form of a water-soluble salt or in the form of a copper complex.

Example 4 30.9 parts of diethylenetriamine, boiling point 205-20'l C. are placed in a' vessel fitted with stirring gear and 24.8 parts of dicyandiamide added with stirring. The product is warmed to about 100 0., whereby the material begins to evolve ammonia. The temperature is then slowly raised to 145-l60 C. The originally liquid product becomes thereby more and more viscous. After 5-8 hours the reaction is interrupted and the product poured out, allowed to cool and powdered. The newly formed condensation product itself as well as its water-soluble organic or inorganic salts or metal complexes improve all the wet fastnesses of substantive dyestufis, in particular the fastness to washing in alkaline soap and soda baths.

Example 5 51.5 parts of diethylene triamine and 82 parts of dicyandiamide are placed in a vessel fitted with stirring gear. It is warmed, and at atemperature of 100 C. ammonia begins to evolve, this evolution becoming increasingly strong with increasing temperature. The temperature is raised to 135-180 C. within 4-8 hours. Thereupon the mass which is then only movable with the most powerful stirring gear is emptied out and powdered after cooling. It has similar properties to the substance prepared according to Example 4.

Example 6 20.4 parts of diethylenetriamine, boiling point 205-207 C. and 16.8 parts of cyanamide, melting point 38-42 C. are introduced into a vessel fitted with stirring gear and a reflux condenser and gradually warmed, the cyanamide being polymerised to dicyandiamide. The temperature increases rapidly and by regulating the heating, or by cooling if necessary, the reaction is kept under control. At (SO-70 C. evolution of ammonia begins, and the temperature is then gradually increased to 130-150 C. and finally to about 170 C. The process is concluded after hours. The thick viscous liquid product is poured out and after cooling is powdered. It can be used in the form of a water-soluble salt of an organic or inorganic acid or if desired in the form of a water-soluble complex of a polyvalent metal, e. g. a copper complex, for the improvement of the fastness of dyeings of textile materials with substantive dyestuffs.

Instead of cyanamide, dicyandiamide can be used with the same result. 'For the conversion of the base obtained into a water-soluble salt the following process can be used.

50 parts of the base are powdered and made into paste with 40 parts of water at 30 C. 18.5 parts of sulfuric acid (d=1.84) are diluted with 20 cc. of water and cooled. This acid is added with good stirring to the paste containing water. The temperature of neutralisation should not exceed 50 C., and if desired itis controlled by the addition of ice. When the neutralisation is finished it is stirred for a further hour, and the whole is evaporated to dryness in a vacuo at 70-90 C. A water-soluble powder is thus ob tained.

' Instead of sulfuric acid an equivalent quantity of any monoor polybasic acid can be used, such as hydrochloric acid, phosphoric acid, citric acid,

7 of dicyandiamide are placed in a vessel fitted with stirring gear and the whole maintained at a temperature of 107-157 C. for 6-8 hours, cooled and ground. If 45 parts of the product thus obtained are dissolved in 200 parts of water and neutralized with 27 parts of 36.5 per cent hydrochloric acid and 15 parts of hydrated copper sulfate in 60 parts of water added thereto, there is obtained a turbid solution of the copper complex, which is evaporated to dryness in the usual manner and gives a water-soluble green powder which renders substantive dyeings on textiles fast to washing and to light.

Example 8 66 parts of diethylenetriamine carbonate, as

is obtained in a crystalline form by the introduction of carbon dioxide into an alcoholic solution of diethylenetriamine, are melted and mixed with 33.6 parts of dicyandiamide in a closed vessel fitted with stirring gear. It is then warmed during 6 hours at 140-160 C., whereby the mass becomes continuously thicker until it is finally hardly capable of being stirred. It is allowed to cool and thesolidified bubble-containing product is powdered. This product is basic and can be used as such or in the form of a water-soluble salt.

The condensation products obtained according to Examples 1 to 8 can be used in the following manner in concentrations of 0.1-2.0 grams per litre for the improvement of the fastness properties of dyeings with substantive dyestuffs, in which either the condensation product itself or also its water-soluble salts or complexes with polyvalent metals can be used.

Example 9 Viscose dyed with 2 per cent of Solar Violet BL (Schultz Farbstofitabellen, 1. Erganzungsband, 1934, page 133) is introduced into a solution of 0.3 gram per litre of one of the condensation products described in Examples 1 to 8, the ratio of the quantity of the material to the quantity of liquid in the bath being 1 to 30. The dyeing is treated at temperatures between 20 and C. for 5-20 minutes with frequent movin about. The material thus after-treated can be centrifuged and dried with or without intermediate rinsing, and after-treatment ata higher temperature in certain cases improves the fastness to washing and dyeings with substantive dyestuffs to a still greater extent. Hot drying is in no way necessary as the still wet directly centrifuged material shows an excellent fastness to alkaline washing liquids without any intermediate drying.

Dyeings with other substantive dyestuffs, e. g. such as those with Solar Rubinol B, Solar Grey 2BL (Schultz Farbstofitabellen, 2. Erganzungsband, 1934, page 260) and Solar Grey R (Schultz Farbstofitabellen, l. Erganzungsband, 1934, page 133) will be improved with the above named condensation products. V

Instead of dyeings; printings prepared in the usual manner with said dyestuffs may be treated with the condensation products mentioned in the preceding examples or with soluble salts or soluble polyvalent metal derivatives thereof, in

order to improve the fastness properties of these printings.

What we claim is:

l. A process for improving the fastness properties of dyeings and printings produced with direct dyestuffs which comprises treating such dyeings and printings with a member selected from the group consisting of a water-soluble polymeric organic nitrogen compound, obtained by heating, as sole reactants, one mol of an amine of the formula wherein m is a positive integer, with two equivalents of a compound selected from the group consisting of monomeric and dimeric cyanamide until ammonia is evolved and then raising the temperature to between about 125 and about 180 C. and maintaining it between these limits for several hours, and the water-soluble salts and complex copper compounds thereof.

2. A process for improving the fastness properties of dyeings and printings produced with direct dyestuffs which comprises treating such dyeings and printings with a member selected from the group consisting of a water-soluble polymeric organic nitrogen compound obtained by heating, as sole reactants, one mol of an amine of the formula wherein m is a positive integer, with one mol of dicyandiamide to a temperature of about 100 to about 125 0. whereby ammonia is evolved and then maintaining the temperature at about 125 to about 180 C. for several hours, and the watersoluble salts and complex copper compounds thereof.

3. A process for improving the fastness properties of dyeings and printings produced with direct dyestuffs, which comprises treating such dyeings and printings with a water-soluble polymeric organic nitrogen compound, obtained by heating, as sole reactants, one mol of diethylenetriamine and one mol of dicyandiamide to a temperature of about 125 C. to about 180 C. for several hours, whereby ammonia is evolved.

4. A process for improving the fastness properties of dyeings and printings produced with direct dyestufis which comprises treating such dyeings and printings with a water-soluble polymeric organic nitrogen compound, obtained by heating, as sole reactants, one mol of trithylenetetramine and one mol of dicyandiamide to a temperature of about 140 C. for several hours, whereby ammonia is evolved.

5. A process for improving the fastness properties of dyeings and printings produced with direct dyestuffs, which comprises treating such dyeings and printings with a water-soluble polymeric organic nitrogen compound, obtained by heating, as sole reactants, one mol of tetraethylenepentamine with one mol of dicyandiamide to a temperature of about 115 C. to about 170 C. for several hours, whereby ammonia is evolved.

6. A process for improving the fastness properties of dyeings and printings produced with direct dyestufis, which comprises treating such dyeings and printings with a complex copper compound of a water-soluble polymeric organic nitrogen compound obtained by heating, as sole reactants, one mol of an amine of the formula wherein m is a positive integer, with two equivalents of a compound selected from the group consisting of monomeric and dimeric cyanamide until ammonia is evolved and then raising the temperature to between about and about 180 C. and maintaining it between these limits for several hours.

7. Textile material, colored or printed with a direct dyestufi and aftertreated with a member selected from the group consisting of a watersoluble polymeric organic nitrogen compound, obtained'by heating, as sole reactants, one mol of an amine of the formula wherein m is a positive integer, with two equivalents of a compound selected from the group consisting of monomeric and dimeric cyanamide until ammonia is evolved and then raising the temperature to between about 125 and about 180 C. and maintaining it between these limits for several hours, and the water-soluble salts and complex copper compounds thereof.

8. Textile material colored or printed with a direct dyestuif and aftertreated with a watersoluble polymeric organic nitrogen compound, obtained by heating, as sole reactants, one mol of diethylenetriamine and one mol of dicyandiamide to a temperature of about 125 C. to about 180 C. for several hours, whereby ammonia is evolved.

9. Textile material, colored or printed with a direct dyestuif and aftertreated with a Watersoluble polymeric organic nitrogen compound, obtained by heating, as sole reactants, one mol of triethylenetetramine and one mol of dicyandiamide to a temperature of about C. for several hours, whereby ammonia is evolved.

10. Textile material, colored or printed with a direct dyestuff and after treated with a watersoluble polymeric organic nitrogen compound, which may be obtained by heating, as sole reactants, one mol of tetraethylenepentamine with one mol of dicyandiamide to a temperature of about 115 C. to about C. for several hours, whereby ammonia is evolved.

11. Textile material, colored or printed with a direct dyestuff and aftertreated with a complex copper compound of a water-soluble polymeric organic nitrogen compound, which may be obtained by heating, as sole reactants, one mol of diethylenetriamine and one mol of dicyandiamide to a temperature of about 125 C. to about C. for several hours, whereby ammonia is evolved.

HANS MARTIN HEMMI. PAUL TBEFZER.

References Cited in the file Of this patent UNITED STATES PATENTS Number Name Date 2,214,067 Petersen Sept. 10, 1940 2,268,273 Wilkes Dec. 30, 1941 2,364,725 Landolt Dec. 12, 1944 2,364,726 Landolt Dec. 12, 1944 2,376,891 Alles May 29, 1945 2,526,106 Olbrecht Oct. 17, 1950 FOREIGN PATENTS Number Country Date 522,539 Great Britain June 20, 1940 822,252 France Sept. 13, 1937 

1. A PROCESS FOR IMPROVING THE FASTNESS PROPERTIES OF DYEINGS AND PRINTINGS PRODUCED WITH DIRECT DYESTUFFS WHICH COMPRISES TREATING SUCH DYEINGS AND PRINTINGS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF A WATER-SOLUBLE POLYMERIC ORGANIC NITROGEN COMPOUND, OBTAINED BY HEATING, AS ROLE REACTANTS, ONE MOL OF AN AMINE OF THE FORMULA 